Nearly 40 years after Mel Brooks breathed new life into Frankenstein, his son, Max, author of "World War Z," is unearthing that other undead goldmine: zombies. He talks with Fast Company about how to identify the undead, why they are so damn popular right now, and what it's like to have Brad Pitt on your side.

Nearly 40 years after Mel Brooks breathed new life into Frankenstein, his son, Max, author of "World War Z," is unearthing that other undead goldmine: zombies. He talks with Fast Company about how to identify the undead, why they are so damn popular right now, and what it's like to have Brad Pitt on your side.